EPRO PR9268/017-100 170mm Standard Keyphasor & Speed Eddy Current Probe

The EPRO PR9268/017-100 is a dedicated non-contact keyphasor and rotational speed eddy current sensor in the professional PR9268 series, functionally different from conventional vibration and displacement probes. Designed exclusively for rotational speed acquisition and phase reference positioning of large rotating machinery, this model features 170mm effective detection distance and standard 100 industrial specification, delivering stable pulse signal output for shaft speed measurement and phase angle synchronization. With strong anti-interference capability and long-distance detection adaptability, it perfectly matches EPRO signal processors and MMS6000 TSI system, serving as the core phase and speed monitoring component for turbines, compressors and heavy rotating units in power and petrochemical industries.

1. Professional Keyphasor Structural & Installation Advantages

PR9268/017-100 adopts integrated high-strength stainless steel probe body with oil-resistant, dust-proof and high-temperature passivation treatment, tailored for long-term continuous operation in bearing box oil mist and industrial harsh environments. Unlike short-range vibration probes, this keyphasor sensor is optimized with extended induction structure to support 170mm ultra-long detection distance, solving installation interference and detection failure caused by limited mounting space between probe head and shaft keyway or bolt trigger.

Adopting standard industrial thread mounting structure, the probe supports flexible fixed installation on unit casings and support bases. The 100 standard specification features unified structural rigidity and installation tolerance, ensuring consistent triggering accuracy after long-term vibration operation. It is specially designed for keyway/bolt trigger phase detection, requiring no precise ultra-close spacing adjustment like displacement probes, greatly simplifying on-site alignment and commissioning while maintaining stable phase referencing accuracy.

2. Speed & Phase Professional Measurement Performance

Focused on rotational speed and phase signal acquisition, PR9268/017-100 outputs standard high-stability pulse signals synchronized with shaft rotation. It accurately captures each trigger pulse generated by shaft keyways or positioning bolts, realizing real-time rotational speed calculation and phase angle reference positioning for rotating machinery. Factory calibrated with standard metallic trigger targets, the sensor features ultra-low pulse missing rate and zero false triggering, providing reliable phase benchmark data for shaft vibration vector analysis, fault frequency spectrum diagnosis and unit load fluctuation monitoring.

It supports a wide speed measurement range, covering ultra-low-speed creeping, variable-speed adjustment and rated high-speed operation of large industrial rotating units. With a working temperature range of -40℃ to +180℃ and excellent temperature stability, it maintains consistent pulse waveform and triggering threshold under drastic ambient temperature changes, avoiding phase drift and speed data jitter caused by environmental fluctuations, ensuring 24/7 stable phase reference monitoring.

3. Standard Cable Transmission & Anti-interference Performance

Equipped with industrial-grade matched cable, the probe adopts high-purity oxygen-free copper core and high-temperature PTFE insulation layer, with outstanding anti-aging, oil corrosion and thermal radiation resistance. The stable cable structure adapts to long-term fixed laying of on-site speed and phase monitoring points, avoiding signal interruption and waveform distortion caused by cable aging and mechanical fatigue.

Built-in double-layer shielding structure effectively isolates on-site power frequency interference, electromagnetic crosstalk and ground loop fluctuation generated by high-power equipment. Through professional factory impedance matching for pulse signal characteristics, it realizes distortion-free transmission of high-speed trigger pulses, ensuring complete and stable output of phase and speed signals even in complex industrial electromagnetic environments, without pulse loss or waveform distortion.

4. Supporting Signal Processor & System Matching Features

PR9268/017-100 cooperates with dedicated EPRO signal processing modules to complete keyphasor pulse shaping, filtering and speed conversion, perfectly compatible with MMS6000 TSI system speed and phase acquisition cards. Its matching logic is specialized for pulse signal acquisition, different from vibration displacement demodulation circuits:

• Speed & Phase Processing Module: Professional pulse signal shaping circuit filters clutter interference, converts original trigger pulses into standard square-wave signals, supports accurate speed calculation and phase locking for unit vibration analysis.

• Field Signal Conditioner: Enhanced anti-interference processing for on-site long-distance pulse transmission, effectively eliminating stray pulse interference and ensuring phase reference accuracy for multi-point synchronous monitoring systems.

• Terminal Integrated Module: Centralized pulse signal acquisition and wiring management, suitable for batch speed and phase monitoring renovation of old large-unit monitoring systems.

5. Core Product Selling Points & Industrial Value

• 170mm Ultra-long Detection Distance: Extended sensing design solves installation spacing limitations of conventional keyphasor probes, adapting to large-gap shaft trigger monitoring scenarios with no need for high-precision spacing calibration.

• Dedicated Speed & Phase Dual Function: Professional keyphasor positioning and rotational speed measurement function provides accurate phase benchmark for unit vibration analysis, which cannot be replaced by ordinary vibration probes.

• Ultra-stable Pulse Triggering Performance: Zero false triggering and low pulse loss rate ensure long-term continuous and reliable phase reference data, supporting accurate equipment fault diagnosis and trend analysis.

• Excellent Harsh Environment Adaptability: Industrial-grade oil-proof, high-temperature and anti-vibration design adapts to long-term operation in turbine bearing boxes and heat-intensive equipment cabins.

• Standardized Plug-and-play Replacement: 100 unified standard specifications support seamless replacement of old PR9268 series probes, reducing system renovation difficulty and on-site debugging workload.

6. Industrial Application Scenarios

• Phase reference and rotational speed monitoring of large thermal power steam turbines and gas turbine units

• Keyphasor synchronization acquisition for petrochemical heavy-duty centrifugal compressors and process rotating machinery

• Shaft phase locking and speed real-time monitoring for industrial large-scale variable-speed rotating equipment

• Precision upgrade and phase signal stabilization renovation of old unit phase and speed monitoring systems